package org.apache.bcel.classfile;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache BCEL" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
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 *
 * 5. Products derived from this software may not be called "Apache",
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import  org.apache.bcel.Constants;
import  java.io.*;

/** 
 * This class is derived from the abstract 
 * <A HREF="org.apache.bcel.classfile.Constant.html">Constant</A> class 
 * and represents a reference to a Double object.
 *
 * @version $Id: ConstantDouble.java,v 1.2 2006/08/22 15:33:21 andos Exp $
 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
 * @see     Constant
 */
public final class ConstantDouble extends Constant implements ConstantObject {
	private static final long serialVersionUID = -1579792820433342816L;
private double bytes;

  /** 
   * @param bytes Data
   */
  public ConstantDouble(double bytes) {    
    super(Constants.CONSTANT_Double);
    this.bytes = bytes;
  }    

  /**
   * Initialize from another object.
   */
  public ConstantDouble(ConstantDouble c) {
    this(c.getBytes());
  }    

  /** 
   * Initialize instance from file data.
   *
   * @param file Input stream
   * @throws IOException
   */
  ConstantDouble(DataInputStream file) throws IOException
  {    
    this(file.readDouble());
  }    

  /**
   * Called by objects that are traversing the nodes of the tree implicitely
   * defined by the contents of a Java class. I.e., the hierarchy of methods,
   * fields, attributes, etc. spawns a tree of objects.
   *
   * @param v Visitor object
   */
  public void accept(Visitor v) {
    v.visitConstantDouble(this);
  }    
  /**
   * Dump constant double to file stream in binary format.
   *
   * @param file Output file stream
   * @throws IOException
   */ 
  public final void dump(DataOutputStream file) throws IOException
  {
    file.writeByte(tag);
    file.writeDouble(bytes);
  }    
  /**
   * @return data, i.e., 8 bytes.
   */  
  public final double getBytes() { return bytes; }    
  /**
   * @param bytes.
   */
  public final void setBytes(double bytes) {
    this.bytes = bytes;
  }    
  /**
   * @return String representation.
   */
  public final String toString()
  {
    return super.toString() + "(bytes = " + bytes + ")";
  }    

  /** @return Double object
   */
  public Object getConstantValue(ConstantPool cp) {
    return new Double(bytes);
  }
}
